JavaScript Minifier

Removes recognized line and block comments, collapses whitespace, and trims space around common JavaScript punctuation. Quoted strings, template literals, and escaped characters are preserved by the character scanner.

Paste code, review the output that updates immediately, and copy it when ready. Reset clears the editor; the tool does not create a file or source map.

This is not a JavaScript parser, bundler, compiler, mangler, or standards-aware minifier. It does not rename identifiers, remove unreachable code, combine modules, validate syntax, or understand regular-expression literals and automatic semicolon insertion. Comment-like text, regex syntax, or line-sensitive statements can be interpreted incorrectly and change behavior.

A left-to-right character scan tracks whether it is inside a string, template literal, or comment; recognized `//` and `/* */` comments are dropped entirely once the scan confirms they are not inside quotes.

Pasting `function add(a, b) { // sum return a + b; }` produces `function add(a,b){return a+b;}`, with the comment removed and spacing around punctuation trimmed.

Run the minified output through your test suite before deployment, checking any code with regular-expression literals or automatic-semicolon-insertion-sensitive line breaks, since those are the cases most likely to be altered incorrectly.

Keep the original and run tests plus a production-grade minifier before deployment. Compare behavior, not only file size. Processing is local in your browser and pasted code is not uploaded.